Blurry Vision: Causes and Concerns for Eye Health - Ophthalmology

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Understanding blurry vision can be quite complex, as it can stem from various underlying causes. In your case, the recent changes in your vision, including the decrease in left eye acuity and the emergence of astigmatism, could be attributed to several factors.
Firstly, it's important to recognize that fluctuations in vision can occur due to changes in the eye's refractive state. This can happen for various reasons, including changes in the shape of the cornea, lens, or even the eye's overall structure. If you have a history of retinal issues, such as the laser treatment you mentioned for retinal tears, this could also play a role. The laser treatment can sometimes lead to changes in how light is focused in the eye, potentially resulting in blurry vision or the perception of flashes and floaters.

The presence of flashes of light (photopsia) and floaters can be concerning, especially following retinal surgery. While these symptoms can be benign, they can also indicate changes in the vitreous gel or even retinal detachment in some cases. It’s crucial to monitor these symptoms closely. If the flashes or floaters increase in frequency or intensity, or if you experience a sudden change in vision, you should seek immediate medical attention.

Regarding your question about whether you need another dilated eye exam (散瞳檢查), it can be beneficial, especially if you are experiencing new symptoms or changes in your vision. A comprehensive eye examination, including dilation, allows the ophthalmologist to thoroughly assess the retina and other structures in the eye. This is particularly important given your history of retinal issues.

In addition, the changes in your vision could also be influenced by other factors such as eye strain, especially if you spend long hours on screens or reading. Prolonged screen time can lead to digital eye strain, which may cause temporary blurry vision, discomfort, and fatigue. Taking regular breaks using the 20-20-20 rule (every 20 minutes, look at something 20 feet away for 20 seconds) can help alleviate some of these symptoms.

Moreover, if you are wearing contact lenses, ensure that they are the correct prescription and that you are following proper hygiene practices. Improper use of contact lenses can lead to discomfort and vision changes as well.

In summary, the recent changes in your vision could be multifactorial, involving refractive changes, potential effects from previous retinal treatments, and possibly eye strain. A follow-up with your eye care provider for a comprehensive examination, including dilation, is advisable to rule out any serious issues and to ensure that your eye health is being closely monitored. Always prioritize your eye health, especially with a history of retinal concerns, and don't hesitate to reach out to your ophthalmologist with any new or worsening symptoms.